题解 | #网购#
网购
https://www.nowcoder.com/practice/5d7dfd405e5f4e4fbfdff6862c46b751
n=list(map(float,input().split()))
if n[1]==11 and n[3]==1 and n[0]*0.7>50:
print(f"{(n[0]*0.7-50):.2f}")
elif n[1]==11 and n[3]==1 and n[0]*0.7<=50:
print("0.00")
elif n[1]==11 and n[3]==0:
print(f"{(n[0]*0.7):.2f}")
elif n[1]==12 and n[3]==1 and n[0]*0.8>50:
print(f"{(n[0]*0.8-50):.2f}")
elif n[1]==12 and n[3]==1 and n[0]*0.8<=50:
print("0.00")
else:
print(f"{(n[0]*0.8):.2f}")
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